Types of welding and their features

Non-removable joining of metal parts is the welding process itself. In this case, the metal itself is tried to heat up to a temperature that is optimal for this or that process. But there are also cold types of welding, when no heating is used, and the parts are compressed by mechanical force. As a result, the connection takes place.

Characteristics of the welding process

When different types of welding are used, the processing of metals occurs through the use of concentrated or concentrated energy flows. Surfaces must be completely free of contaminants and oxides. Only in this way will it be possible to hope for the corresponding result. Sedimentary pressure - the so-called pressure that occurs when welding. Thanks to it, a deformation is created at the junction point, which allows you to connect the parts. It should be added that only very ductile metals make it possible to use the types of welds that do without heating.

Welding processes: about classification

In general, there are two main ways by which metals can be combined when heated. For example, when the sediment pressure is used, plastic deformation is created . In this case, an external force is applied in the form of pressure, so that the metal is deformed at the junction. Such types of welding require the metal to maintain a solid state. In addition, in different situations, preliminary surface heating may or may not be required. The main thing is that the mechanical properties of the metal do not change at all under such influence.

Melting as a welding method

In this method, the parts are joined during the melting of the metal. This procedure is carried out at the point of contact in the parts to be welded. Sometimes used filler metal, sometimes do without such additives. This process is used, including some types of arc welding. The fusion of molten metal occurs arbitrarily. A common weld pool is formed. When the metal hardens, a rigid weld seam is formed.

Main types of welding

If in several processes the same heat source is used to heat or melt, welding is combined into species. For example, there are types of welding by melting or pressure. Variants of any kind are combined in ways. For example, the methods of electric welding can be suture, point and butt. The main species are grouped according to these characteristics.

Additional information about the classification

Types of energy used, too, sometimes become the basis for the separation of welding processes into several groups. So, distinguish between electric and gas welding. Conditionally, for example, laser and ultrasonic welding will relate to the electric type. In this case, special devices are used that convert electrical energy, after which it becomes thermal. It is this kind of it that allows you to heat the necessary parts to the required temperature.